Hey @ASTRO Vertigo, I made some research in regards to Dolby Headphone and it seems there are 3 different options known as DH1, DH2 and DH3. Quoting a post from another forum: - DH1 simulates a dampened studio environment with near field monitor speakers. This has very little to no echo. - DH2 is a 'standard' listening room with some echo and the speakers simulated further away. - DH3 is a large room with extra echo (maybe something like a jazz club or music arena). I would appreciate if you could expand a bit more on which dolby headphone technology runs the Mixamp Pro TR. Considering the difference in sound between the TR and the older mixamp models (2013 edition or even older) has Astro changed dh mode in the latest model?